The calculated distance (air line) between Mechelen-aan-de-Maas and Saint-Gilles is approximately 60 miles respectively 96 kilometers.
By car or train, the actual journey to Saint-Gilles is certainly longer, as only the direct route (as the crow flies) between Mechelen-aan-de-Maas and Saint-Gilles has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles